Thought i'd just highlight a potential problem, i've noticed i can get double the number of CP's from banner clicking if i was so inclined as after the backup all the links reappeared.
I clicked on one to test and yes it did award me the 10CP's.
This may have happened as i did my CP clicking during the time of the daily backup but may be something you would like to know of as a potential bug.
Lesley
As an update to my query it seems it is not an isolated incident and the banners don't disappear until they are clicked twice, and yes this does mean you can get double CP's if you so insist.
Near as I can tell you have not received any extra cps. For the images to disappear you need to reload the page. Yes it is possible to vote more than once, but most sites do not count them and we do not reward more than every 24hrs exactly.